Steam-pipe joint.



B. D. COPPAGE.

STEAM PIPE JOINT.

APPLICATION FILED JAN-19, 1915.

Patented Apr. 25, 1916.

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2 SHEETS-SHEET I.

B. D. COPPAGE.

STEAM PIPE JOINT. AP'PucAnou FILED JAN-19.1915- 2 SHEETS-SHEET 2.

DUN/mama Patented Apr. 25, 1916.

STEAM-PIPE JOINT.

Specification of Letters Patent.

Patented Apr. 25, 1916.

Application filed January 19, 1915. Serial No. 3,108.

To all whom it may concern:

Be it known that T, BENJAMIN DENVER CoPPAGE, a citizen of the United States of America, and a resident of Wilmington, Delaware, have invented a new and useful Improvement in Steam-Pipe Joints, whlch invention is fully set forth in the following specification.

The present invention is an improvement in steam joints, the invention, relating particularly to metallic steam pipe joints for revolving drums, such as are used in drying pulp andpaper. w

The articular object of the invention is to provide a steam joint construction which will permit the independent expansion and contraction of the connecting steam-supply and water-discharge pipes; which will automatically adjust itself for wear of the bearings and journals (by which the relation of the rotating parts of the joint to the sta- ,tionary parts is altered); and which, further, will automatically adjust itself for a considerable amount of unevenpressure of the retaining bolts, and for a considerable lack of ali-nement in the piping connections.

Hereto-fore the connection of thesteamsupply pipe and the water-discharge to a single part of the steam joint (as in the patent to Thomas H. Savery No. 635,512, dated October 24, 1899) made itnecessary to keep the compression on the springs very considerable to overcome the strain set up,-

due to the lack of flexibility in the arrangement of the steam joint. The joint of the present invention has flexibility sufiicient to overcome this objection and such flexibility is materially increased byreason of the introduction of a flexible pipe or tube attached to a disk which separates the two abutments to which the steam-supply and water-discharge pipes are respectively connected. The device of this Savery patent operates very efficiently when the water of condensation is removed from the drums by means of a stationary siphon. In the modern high-speed paper-making machines employing dippers which revolve with the drums, it is usual, in employing this Savery construction, to permit the water-discharge pipe F to rotate in the wall of the abutment G, which wall separates the steam-inlet space from the water-discharge space. The

opening about the pipe at this point allows the steam to pass through the wall or partition from the steam cavity to the water cavlty, thus mingling with the water inthe water pipe, and sometimes raising the pressure 1n said pipe to a point above that which exlsts in the drum or drier. Whenever it happens that the pressure in the water pipe becomes greater than the pressure \in the drum, it is difficult to discharge the water in the drum, as the static head of pressure 1n the dipper is overcome by the higher steam pressure in the water pipe.

It is a further object of the present invention to provide a construction which will overcome this objection, and which will at all times effectively prevent the steam from escaping directly into the water discharge plpe. v

The invention will be better understood by reference to the accompanying drawing,

. illustrating one embodiment of the invenpartly in elevation,-showing one end of a.

drum or drier which is. provided with the present invention, said drum having mounted therein a dipper for removing water of condensation; Fig. 2 is a sectional view on the line 2-2 of Fig. 1 Fig. 3 is a perspective view of the invention; Fig. 4 is a detail perspective view, showing the driving connections between the journal and the waterdischarge pipe; and Fig. 5 is a perspective view of an oil-box lid.

Referring to the drawings, wherein like reference numerals refer to like parts, 10 is a revolubledrier cylinder drum or the like, closed at one end by a head 11, the latter having thereon a tubular trunnion or journal 12, through which steam may pass into the cylinder about a water discharge pipe 13, which is preferably arranged concentric to the axis of rotation of said trunnion or journal. It is to be observed that the opening through the pipe and the opening through the trunnion around the pipe constitute two concentric passages, one for water and one for steam. The pipe 13 is preferably flexible and expansible, for reasons hereinafter stated, and made of corrugated copper tubing. The inner end of said pipe 13 is wound with a suitable packing,

such as asbestos, and projects into a gland manner. The receiving chamber 15 is se cured to, and rigidly supported from, the drum head by any suitable means, as bolts 19 and 20. The-two curved trough-like dippers terminate at their outer ends near, and approximately in contact with, the peripheral wall of the drum, and each dipper is secured directly to the cylinder by a bolt 21 and straps 22, 22, with hooked ends engaging over the sides of the dipper, all as learly shown in Fig. 2.

At the outer end of the rotating member which comprises the trunnion 12 and the pipe .13, abutment means are provided having, independent passages therein which are in longitudinal register respectively with the said pipe 13" and with the opening in the trunnion 12 around the pipe. Preferably the abutment means comprise two separate elbows or abutments 25 and 27 to which '.are connected respectively, pipes 26 and 28.

Through the pipe 28 steam is admitted to the abutment 27, and through the pipe ,26

water is discharged from the abutment 25.

Interposed between the rotating member and the abutment means are joint means which serve to maintain a tight .joint' between each passage of the rotating member and the corresponding passage of the abutment means. When two separate abutments 4 are provided, as shown, there are preferably two separate joint means in the form of disks 23 and 30, the disk 23 being interposed between the abutments 25 and 27, and the disk 30 being interposed between the abutment 27 and a collar 29 secured to the. end of the trunnion 12. Preferably the pipe 13 projects entirely through the disk 23, and is expanded into said disk to help form the steam-tight joint. The pipe or tube 13 is wound at this point with wire, and a key 24 is provided to help secure the pipe to the disk 23. The pipe 13 is rotated in any suitable manner and the disk valve 23 rotates therewith. Preferably one face of the valve is curved, and engages a correspondingly shaped valve seat in the elbow in the relative positions of the arts. The second disk valve 30 is provided with a curved face and a fiat face, the curved face preferably engaging a similarl shaped seat on abutment 27, and the flat time engaging the collar 29. The disk valve 30 can alsobe considered as floating inasmuch as it is without positive connection either with the abutment 27 or with the rotating ring 29. It is free to move to adjust itself in accordan'ce with minor variations in the relative positions of these parts. In the preferred embodiment, this collar 29 carries the means for rotatin pipe 13 with the trunnion or journal 12, and as here shown said collar is provided with two pairs of ribs 31 and 32, which ribs are engaged by a driving dog 33, whichis fixedly secured to' the pipe 13 by means of a key 34. The tube 13 is preferably surrounded by a Wrapping of wire at the point where the key 34 engages the same, which wire is soldered in the grooves to prevent the wire from becoming loose when cut through by the key. The engagement of this dog 33 between the ribs 31 and 32 causes the pipe 13 and the disk valve 23 to rotate with the journal or trunnion. and yet allows the pipe 13 to expand and con- ,tract longitudinally. The faces of vanes 33', which project into the space between ribs 31 and 32, are curved to permit the pipe 13 to bend laterally.

The described construction permits the steam pipe 28 to rise and fall by expansion, thus shifting the disk valve 30 up and down;

ing place when the hearing which carries the journal or trunnion wears away, which wearing permits the journal or trunnion to lower. The sliding connection between the asbestos-wound inner end of the pipe 13 and the gland 14 takes care of the expansion and contraction of said pipe, as well as wear upon the surfaces of the disk valves 23 and 30, which valves, in the course of time, may wear down as much as half an inch each, making a total wear of one inch before they are worn out. The fact that said pipe 13 telescopes into the gland 14, and does. not

rotate relatively to said gland, prevents any considerable friction at this point which would soon cause wear, and shortly result in a troublesome connection.

The disk valves 23 and 30, the elbows 25 and 27, and the collar 29 are held in position' under yielding pressure. Preferably,

two springs are employed to hold the parts,

together at a predetermined pressure and,

as here shown, each spring 35 surrounds a rod or bolt 36. These bolts project through lugs 37 on a sleeve 29, carried by collar 29, lugs 38 .on elbow or abutment 2 7, and housings 39 provided on elbow or abutment 25, in which housings the springs 35 are carried. The tension of the springs may be'adjusted by any suitable means, as by a nut 40 carried on the end of each rod or bolt 36.

The disk valves 23 and '30 serve not only to form normally tight joints in the way that has been described, but they also serve as safety valves to prevent undue increaseof.

pressure in the drum..- It is obvious that if the pressure in the steam pipe rises above a certain definite amount, the springs 35, 35 will yield permitting one of the disks to separate at one side from one of the parts with which it cooperates. Such separation of the disk from its companion member permits the steam to escape, and reduces the pressure below the danger point.

The provision of separate abutments or elbows 25 and 27 between which the disk valve 23 is interposed prevents any-direct entry of the steam into the water-pipe. Further, this arrangement permits pipes 26 and 28 to expand and contract independent of each other, thus sliding the disk valves on their flat faces; and further permits the elbows or abutments 25 and 27 to turn at various angles, in this event sliding on the curved faces of the disk valves, and also permits said valves to slide on the curved surfaces of the elbows or abutments.

The flexibility of the present joint makes it unnecessary to keep the compression on the springs as great as was the case when the steam-supply and water-discharge pipes were secured to a single part or abutment.

The abutments 25 and 27 and the sleeve 29 each is provided with an oil-cup 41, in the walls of which is fixed a pin 42. The cover l3 of each oil-cup has secured thereto a loop 44, which is suitably connected to said cover, said loop passing around the pin 42. This construction permits the cover to be displaced to introduce lubricant into the oil-cups, while at the same time preventing the'cover from being removed and lost.

While the valve 30 is preferably employed, the device might be employed without said valve, in which event the elbow or abutment 27 I would be yieldingly pressed against the face of collar 29.

The invention has been herein described and illustrated with particular reference to steam joints on drums or driers for papermaking machines, but it is to be understood that the invention may be used equally well While, for the purpose of illustration, one expression of the inventive idea has been shown in detail, it is to be understood that the invention is not limited thereto, but that the inventive idea is susceptible of various embodiments within the limits of the appended claims.

What is claimed is a 1.- The combination with a hollow revolving journal, of a hollow abutment communieating with said journal, a pipe projecting through and rotating with said journal, a second hollow abutment communicating with said pipe, a ,disk interposed between said abutments and forming a tight joint between the pipe and the abutment which communicates therewith, and means for pressing said journal and abutments toward each other 'under yielding pressure.

2. The combination with a hollow revolving journal, of a hollow abutment communicating with said journal, a pipe projecting through and rotating with said journal, a second hollow abutment communicating withsaid pipe, a disk mounted on said pipe and interposed between said abutments, said pipe projecting through the abutment which communicates with'said journal, and means for pressing said journal and abutments toward each other iinder yielding pressure.

3. The combination with a hollow revolving journal, of a hollow abutment communicating with said journal, a disk interposed between said abutment and journal, a pipe projecting through and rotating with said journal, a second hollow abutment communicating with said pipe, and a disk mounted on said pipe and interposed between said abutments.

4c. The combination with a hollow revolving journal, of a hollow abutment communicating with said journal, a disk interposed between said abutment and journal, a pipe projecting through and rotating with said journal, a second hollow abutment communicating with said pipe, and a disk mounted on said pipe and interposed between said I together under yielding pressure. in connection with other classes of devices.

6. The combination with a hollow revolping journal, of a hollow abutment communieating with said journal, a disk interposed between said abutment and journal, a pipe projecting through and rotating with said journal and through the disk interposed between said abutment and journal, and means pressmg said abutments, disks and'journal together under yielding pressure.

7. The combination with a hollow revolv-,

journal, a-second hollow abutment commu nicating with said pipe, a disk interposed between said abutments and forming a tight joint between the pipe and the abutment which communicates therewith, springs for pressing said journal and abutments toward each other, and means for adjusting the tension of said springs.

8. The combination with a hollow revolving journal, of a hollow abutment communicating with said journal, a disk interposed between said abutment and journal, a pipe projecting through and rotating with said journal, a second hollow abutment communicating with said pipe, a disk mounted on said pipe and interposed between said abutments, said pipe projecting through the abutment which communicates with said journal and through the disk interposed between said abutment and journal, springs pressing said abutments, disks and journal together, and means for adjusting the tension of said springs.

9. .The combination with a hollow revolving journal, *of an abutment through which steam isintroduced into said j ournal,a disk interposed between said abutment and journal, a second abutment through which water is discharged, a water pipe projecting through said hollow journal. and. rotating therewith, and a second disk engaging said water discharge abutment and forming .a tight joint between the said abutment and the pipe.

10.. The combination with a hollow re-- 'volving journal, of a flexible pipe projecting therethrough, driving connections between 'said'journal and pipe, an abutment communicating with said. hollow journal, a separate a utment communicating with said pipe, and a disk valve fixedly mounted on said pipe and interposed between said abutments. j i

11. The gombination with a hollow re-. volving journal, of aflexible and 'expansible pipe projecting therethrough, driving connections between said journal and pipe, an abutment communicating with said hollow journal, a separate abutment communicating with said pipe, a disk valve fixedly mounted on said pipe and interposed between said abutments, and a second disk valve interposed between said journal and the abutment that communicates therewith.

12. The combination with a hollow revolving journal, of a flexible pipe project-' ing therethrough, driving connections between said journal and pipe, an abutment communicating with said hollow journal, a

. separate abutment communicating with said pipe, a dlSk valve fixedly mountediion said 'ing with said pipe, a disk valve fixedly.

mounted on said pipe and interposed between said abutments, a second disk valve interposed between said journal and the abutment that communicates therewith, and I means for pressing said journal, abutments and valves together under yielding pressure.

. 14. The combination with a hollow revolving journal, of a pipe projecting through and rotating with said journal, an abutment communicating with said journal, a second abutment communicating with said pipe, a disk valve fixedly mounted on said pipe and interposed between said abutments, said pipe projecting through said disk valve, and

.means for pressing said journal, abutments and valve together under yielding pressure.

15. The combination'with a hollow revolving journal, of a pipe projecting through and revolving with sald journal, an abutment communicating with said journal, 9. disk valve interposed between said journal and abutment, a second abutment communicating with said pipe, and a second disk valve fixedly mounted on said pipe and interposed between said abutments, said pipe projecting through both of said valves. 7

16. The combination with a hollow revolving journal, of a pipe projecting through and revolving with said journal, an abutment communicating with said journal, 9. disk valve interposed between said journal and abutment, a second abutment communicating with said pipe, a second disk valve fixedly. mounted on said pipe and interposed between said abutments, said pipe (projecting through both of said valves, an means for pressing said journal, abutiiients and valves together under yielding pressure.

17. The combination with a hollow body, of a hollow abutment communicating with said body, a pipe projecting through said body, a second hollow abutment communieating with said pipe, and a valve mounted on said pipe and interposed between said abutments.

18. The combination with a hollow body,

\ of a hollow abutment communicating with" said body, a. valve interposed between said abutment and body, a pipe projecting through said body, a second hollow abutlid - menace inent communicating with said pipe, and a disk interposed between said abutments and forming a tight joint between the pipe and thehabutment which communicates therewit 19. The combination with a hollow body, of a hollowabutment communicating with said body, a pipe projecting through said body,

a second hollow abutment communicating with said pipe, a valve interposed between said abutments and forming a tight joint between the pipe and the abutment which communicates therewith, andmeans pressing said abutments, valve and body together "the abutment which communicates there with, and means pressing said abutments,

' 'V&1VBS and body together under yielding pressure.

21. The combination with ahollow' body, of an abutment through which steam is introduced into said body, a separate waterdischarge abutment, a valve interposed between said abutments, and a Water-discharge pipe projecting. through said body and connected to said valve.

22. The combination with a hollow body,

of an abutment through which steam is introduced into said body, a valve interposed between said abutment and body, a separate water-discharge abutment, a water-dis charge pipe projecting through said body, and a valve mounted on said pipe and interposed between said abutments. 1 23. The combination with a hollow body, of an abutment through which steam is introduced into said body, a valve interposed between said abutment and body, a separate water-discharge abutment, a flexible waterdischarge pipe projecting through said body, and a valve mounted on said pipe and interposed between said abutments. 24:. The combination with a hollow body,v of an abutment through which steam is introducedintosaidbody, a valve interposed between said abutment and body, a sepatively with the said concentric passages, floating joint means between the end of the inner passage of therotatingpart and the end of the registering passage of the stationary part, and floating joint means-between the end of the outer passage of the rotating part and the end of theiregistering passage of the stationary part.

26. A combined steam and water duct comprising a rotating part and a non-rotating part, the rotating part having concentric passages and the non-rotating part having passages in longitudinal register respec v tively with the said concentric passages, floating jolnt means between the end of the inner passage of the rotatin part and the end of the registering passa e of the stationary part, and floating joint means between the end of the outer passage of the rotating part and the'end of the registering passage of the stationary part, each of the said joint means having one surface spherical and one surface plane. f

27. -A combined steam and waterduct comprising a rotating part and a non-rotating part, the rotating part having concentric passages and the non-rotating part having passages in longitudinal register respectively with the said concentric passages,

floating joint means between the end of the inner passage" of the rotating part and the end of the registering, passage of the stationary part, and joint means between the end of the outer passage oi. the rotating part and the end of the registering passage of the" stationary part and rotatable inde-' pendently of both.

28. The combination of a rotating member having independent concentric longitudinal passages, non-rotating abutment means having independent passages in longitudinal register respectively with the passages in the rotating member, and disk joint means positioned between the rotating member and the abutment means and serving to maintain a tight joint between each passage of the rotating member and the corresponding passage of the abutment means.

29. The combination of a rotating memdinal passages, non-rotating abutment means having independent passages registering respectively with the passages in the rotating member, and floating disk joint means "positioned between the rotating member and the abutment means and serving to maintain a tight joint between each passage of the rotating member and the corresponding pas- .sage of the'abutment means.

' 30. The combination of a hollow rotating drum, a hollow trunnion for the drum, a dipper secured within the drum to rotate therewith, a rotating pipe '-within 7, the hollow trunnion connected at-one end to the dipper, a rotatingdevice in which theother and of the pipe is mounted, an abutment In testimony whereof I have signed this 1 means at the outer end of the trunnion havspecification in the presence of two subscrib- 10 ing two passages one of which is in longituing witnesses. 3 dinal register with the said pipe and the 5 other of which is in longitudinal register BENJAMIFI DENVER GOPPAGE with the trunnion opening outside of the Witnesses: pipe, and a floatingdisk joint means sup- EDWARD MARTIN,

plemental to the said rotating device. H, F.- WELDIN. 

